# A135868 (b-file synthesized from sequence entry) 0 1 1 2 2 9 3 80 4 1368 5 45344 6 2952208 7 381005824 8 97928967168 9 50238812700672 10 51495089926791168 11 105513593089512439808 12 432289346894817079853056 13 3541746937174189008054386688 14 58031524865557213409213540204544